@inproceedings{Cao:2003:ACL,
  author = {Cao, Yunbo  and  Li, Hang  and  Lian, Li},
  title  = {Uncertainty Reduction in Collaborative Bootstrapping: Measure and Algorithm},
  booktitle = {Proceedings of the 41st Annual Meeting of the Association for Computational Linguistics},
  editor = {Erhard Hinrichs and Dan Roth},
  url    = {http://www.aclweb.org/anthology/P03-1042.pdf},
  year   = 2003,
  pages  = {327--334}
}